Class 7 Science Chapter 13 MCQ (Multiple Choice Questions) of Wastewater Story in English Medium updated for CBSE Session 2023-24. All the questions are important and useful of terminal exams and class tests. MCQs are design in such a way it covers the entire chapter 13 of class 7 science. There are about 60 questions in all divided into 10 MCQ online tests.

Class 7 Science Chapter 13 MCQ for 2023-24

Class: 7Science
Chapter: 18Wastewater Story
Contents: MCQ Online Quiz with answers

MCQ Tests with Answers for Class 7 Science Chapter 18

Q1

Which of the following is wastewater?

[A]. Water trickling from a damaged tap
[B]. Water coming out of a shower
[C]. Water flowing in a river
[D]. Water coming out of a laundry
Q2

Sewage is mainly a:

[A]. Liquid waste
[B]. Solid waste
[C]. Gaseous waste
[D]. Mixture of solid and gas
Q3

Which of the following statement is or are incorrect?

[A]. The wastewater and faeces from homes and other buildings which is carried away in sewers, is called sewage.
[B]. The bacteria present in sewage include those bacteria which cause water-borne diseases such as cholera and typhoid.
[C]. An underground pipe which carries away dirty drainage water and waste water, is called a sewer.
[D]. None of the above.
Q4

Rupali is writing some statements, choose the incorrect statement and help her:

[A]. The sewage released by houses and other buildings contain a large number of harmful substances and a disease-causing microorganism.
[B]. Drinking of water contaminated with sewage, spread disease in people which can even lead to death.
[C]. The discharge of untreated sewage into rivers can also kill fish and other aquatic animals.
[D]. None of the above.
Q5

Read the following sentences carefully, and choose the incorrect one:

[A]. Use water is waste water which can be recycled.
[B]. Wastewater is treated in a sewage treatment plant.
[C]. By products of wastewater treatment are sludge and biogas.
[D]. Sewage is a liquid waste which causes water pollution.
Q6

Water polluted by various human activities cause a number of water-borne diseases. Which of the following is not a water-borne disease?

[A]. Cholera
[B]. Typhoid
[C]. Asthma
[D]. Dysentry
Q7

Which of the following statement is or are correct?

[A]. Water that is fit for use and safe for drinking is known as clean water.
[B]. The dissolved and suspended impurities present in water are called contaminants.
[C]. The gas that is produced by decomposition of sludge by the anaerobic bacteria is known as biogas.
[D]. All the above.
Q8

The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as

[A]. Sewers
[B]. Sewerage
[C]. Transport system
[D]. Treatment plant
Q9

The full form of WWTP is:

[A]. World Wide Transport Programme
[B]. Waste Water Treatment Plant
[C]. World Workers’ Talent Programme
[D]. None of these.
Q10

Which of the following is a part of inorganic impurities of the sewage?

[A]. Pesticides
[B]. Urea
[C]. Phosphate
[D]. Vegetable waste
Q11

Which is used in vermi processing toilets?

[A]. Cockroaches
[B]. Earthworms
[C]. Snail
[D]. Silkworms
Q12

Gunja is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Gunja wants to take help from you:

[A]. The wastewater or sewage entering the sewage treatment plant is the first passed through bar screens.
[B]. The wastewater passing through the bar screen is made to flow slowly through a tank called “grit and sand removal tank”.
[C]. The sludge is taken out from the bottom of first sedimentation tank and put into a large, closed tank called “digester tank”.
[D]. None of the above.
Q13

Which of the following is not a source of wastewater?

[A]. Sewers
[B]. Homes
[C]. Industries
[D]. Hospitals
Q14

“No one need to wait for anyone else to adopt a humane and enlightened course of action.” – said by:

[A]. Mahatma Gandhi
[B]. Pandit Jawaharlal Nehru
[C]. Sardar Vallabhbhai Patel
[D]. Subhas Chandra Bose
Q15

Which of the following statements about ozone are correct?

[A]. It is essential for breathing of living organisms and it is used to disinfect water.
[B]. It is used to disinfect water and it absorbs ultraviolet rays.
[C]. It is essential for breathing of living organisms and it absorbs ultraviolet rays.
[D]. It is used to disinfect water and its proportion in air is about 3%.
Q16

Which of the following is not an inorganic impurity present in sewage?

[A]. Nitrate
[B]. Phosphate
[C]. Urea
[D]. Metal salt
Q17

“By providing clean water and sanitation to the poorest people on the planet, we can reduce poverty and suffering and ensure education for all children.”— said by:

[A]. International Labour Organisation (ILO)
[B]. International Monetary Fund (IMF)
[C]. Food and Agricultural Organisation (FAO)
[D]. United Nations International Children’s Emergency Fund (UNICEF)
Q18

In this year board examination, Ajju were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?

[A]. World Water Day 2020, on 22 March, is about water and climate change.
[B]. The theme of 2019 was about tackling the water crisis by addressing the reasons why so many people are being left behind
[C]. In 2017, the theme was “Why Waste Water?” which was about reducing and reusing wastewater.
[D]. All the above
Q19

Which of the following can be used to disinfect the clean water in a sewage treatment plant before releasing it into the distribution system?

[A]. Iodine and Ozone
[B]. Ozone and Oxygen
[C]. Ozone and Chlorine
[D]. Chlorine only
Q20

Durgesh is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. Waste cooking oils and fats should not be thrown in the kitchen sink to go down the drain.
[B]. The climate like paints, solvents, insecticides, medicines and motor oil etc., should not be thrown down the drain.
[C]. The wastes such as solid food remains, used tea leaves, sanitary towels, polythene bags used cotton, hair etc., should not be thrown the drains.
[D]. All the above
Q21

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Untreated human excreta is a health hazard.
[B]. The untreated human excreta cause soil pollution and water pollution.
[C]. More than one billion people in the world do not get safe drinking water.
[D]. None of the above
Q22

One of the following type of trees are said to help in purifying wastewater quite rapidly when planted all along the sewage ponds. These are:

[A]. Eucalyptus tree
[B]. Ficus tree
[C]. Neem tree
[D]. Peepal trees
Q23

Which of the following statement is or are incorrect?

[A]. All the portable toilets are chemical toilets.
[B]. Septic tanks and composting pits are called on-site sewage facility.
[C]. Septic tanks are suitable for those places where there is no sewage system.
[D]. The human waste can not be used in a biogas plant for making biogas.
Q24

The examples of onsite sewage disposal system for human waste are:

[A]. Septic tanks
[B]. Composting pits and
[C]. Chemical toilets.
[D]. All the above
Q25

Vacuum toilets are usually used in:

[A]. Superfast trains
[B]. Cinema halls
[C]. Aeroplanes
[D]. Large ships

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Last Edited: June 13, 2023